One of the oldest Islamic Sects is Yesevi Sect and is relatively tagged with Hodja Ahmet Yesevi , the founder of Turkish sufism in Khorasan. He sent his darwishes to Anatolia which was known as Rumi land to conquer and to deliver the universal message of Islam to all human beings via Asia minor. So the Yesevi darwishes has brought the spirutal messages as well as the conquest of Anatalia by sword from Bukhara to Bursa in the Beginning of 14th century AD after Mongol invasion. They have tried to help the migrants from all over to Khorasan to be settled down in Bursa and they have tried to train them in spirutal way by advising the rules of İslam. It is said that the numbers of Yesevi darwishes who came to Anatolia used to be more than 40.000. One of the great Yesevi darwishes who settled down in Bursa and trained the inhabitants was Seyyid Usul and he came to Bursa with Emir Sultan & Seyyid Nasır, all them were the grand grand children of prophet Mohammed (be peace upon him ). Seyyid Usul established a complex-kulliye- including a mosque, a charity kitchen, a hospital, a madrasah and some stores as soon as he settled down in Bursa. The buiding located in Çekirge district today is accepted one of the remains from a big complex today. The complex was built in 15th century as the founder died & buried in its garden in 1489 and it was enlarged in 1555 adding some more madrasahs next to the main building so it became one the enlighment centers for centuries in Bursa city. The lodge used to play in an active role both in spirutal way performing sema rituals every week and training the scholars for centuries as the school of justice. It was burned down by a catasphoric fire in 1801 and most of its wooden buildings were destroyed after the fire so it was rebuilt by sheikh Mehmet Zuhuri Efendi and went on its training and sema dancing performance until it was closed by the government in 1926 when Turkish repulic was founded. It was left in ruins for a while and it was later restored by the local government and used as a sports salloon. It was given to Bursa Greater City municipality later and Osmangazi municipality restored Seyyid Usul lodge according to original shape and it was open as Seyyd Usul Cultural Center in 2008 for the visitors. Seyyid Usul Lodge has a main building where the sema performance is held every week with musicians and is open the whole week. It is one of the spiritual places of Bursa both visiting the sect rooms & semahane and drinking the famous Turkish tea in its garden by looking at endangered gravestones with nice ephitaphs & written inscriptions explaining the biographies of darwishes and sect masters. The Seyyid Usul loge used to be center of Eşreffiyye sect for a while the unique Eşreffiye tombstones with interesting headgears can be found in the graveyards. There are a lot of tombstones in the graveyards of Seyyid Usul lodge including the founder’s grave. The founder has two tombstones and both of them have written inscriptions on dated 1489. The front & back stones were written in Arabic and have the Kufi calligraphic form. The other gravestones which are worth visiting and taking pictures are ; Seikh İbrahim Dede one of the lodge masters as Eşrefiyye sect dated 1856, Mahmut Beşe the Janissary squad soldier dated in 1791, Ahmet Hamdi Baba the sheik of Seyyid Usul as Uşşaki dated in 1902, Darwish Ahmed Bağdadi as Kadiri member of the lodge dated in 1785 and Fatma Zeynep Hanım from Istanbul with floral pattern tombstone dated in 1910.